Resolve lateinit variables

Do not report UNINITIALIZED_VARIABLE on lateinit variables
Provide delegating constructors for descriptors for compatibility.

compiler/testData/diagnostics/tests/properties/localLateinit/uninitialized.kt

@@ -0,0 +1,22 @@
+fun test1() {
+    lateinit var s: String
+    s.length
+}
+
+fun test2() {
+    lateinit var s: String
+    run {
+        s = ""
+    }
+    s.length
+}
+
+fun almostAlwaysTrue(): Boolean = true
+
+fun test3() {
+    lateinit var s: String
+    if (almostAlwaysTrue()) {
+        s = ""
+    }
+    s.length
+}

compiler/testData/diagnostics/tests/properties/localLateinit/uninitialized.txt

@@ -0,0 +1,6 @@
+package
+
+public fun almostAlwaysTrue(): kotlin.Boolean
+public fun test1(): kotlin.Unit
+public fun test2(): kotlin.Unit
+public fun test3(): kotlin.Unit